Tone chamber



Feb. 6, 1945. F. c. ARTER 2,368,639'

TONE ACHAMBER Filed Sept. 2, 1945 2 Sheets-Sheet 1 I3 uw@ F. C. CARTER Feb. 6, 1945.

TONE CHAMBER Filed Sept. 2, 1945 Sheets- Sheet 2 Patented Feb. 6, 1945 Florence Carter, Willits, Calif.

Application September 2, 1943, Serial No. 500,985

8 Claims.

This invention relates to a tone cabinet.

It primarily is aimed. to provide anovel means or chamber for use in conjunction with or as an accessory to a loud speaker or the like of radio equipment, to improve reception and attain perfect clarity of tone, either instrumental or vocal, in volume and without distortion.

It is further aimed to provide a construction attaining the results mentioned by use of hollow walls and sound boxes, preferably in combination, the sound boxes being arranged above and below the loud speaker, and the higher one being closer to it.

The more specific objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

ln said drawings:

Figure l is a top or plan view of the tone cabinet;

Figure 2 is a front elevation thereof;

Figure 3 is a central vertical sectional view taken longitudinally through the tone cabinet on line 3 3 of Figure 2.

Figure 4 is a transverse vertical sectional view taken on the line 4-4 of Figure 3 and Figure 5 is a fragmentary horizontal sectional view taken below the upper sound box on the plane of line 5-5 of Figure 2'.

Referring specically to the drawings wherein like reference characters designate like or similar parts, my improved tone cabinet has a vertically disposed rear wall at I0, to which is fastened a conventional loud speaker of radio apparatus or the equivalent as at II in position, so that the sound will be discharged within the tone chamber.

Parallel but in spaced relation to each other are two side walls at I2, attached to and extending forwardly from the rear `wall I0. These side walls are in practice approximately one inch thick, made up of plywood panels as at I3 spaced apart to render the walls hollow, and secured to wooden battens as at I4, to rigidify the structure. The rear wall Ill also may be secured lto the battens I4 adjacent thereto, and such rear wall also is adapted to be made of plywood like the Walls or panels I3. It is to be noted that each inner panel I3 has an arcuate groove or slot I5 cut into the same to facilitate vibration of the panels by the sound waves.

At the top and bottom of the improved tone chamber I provide sound boxes as at I6` and I1. The sound box I6 is at the rear of the tone chamber, while the sound box I'I is at the front thereof. The lower wall of sound box I6, designated I8, is inclined forwardly and upwardly, and the upper wall I9 of the lower sound box I1 is disposed at the same angle. In the case of the soundbox IG rear wall I0 constitutes the rear wall of the sound box. A11 walls of the sound boxes i6 and I'I are preferably made from plywood or equivalent material. The sound openings 20 and 2l are provided in the walls I8 and I9 of the sound box. f

It is to be understood that the tone cabinet may be built in any desired sizes and that the size will depend upon the size of the loud speaker with which it cooperates.

I nd in use that with the sound introduced into the tone chamber from the loud speaker I I or the equivalent, there is perfect clarity of tone, either instrumental or vocal; there is volume without distortion, a lack of harshness, greater carrying power; and that many notes that are lost by the ordinary radio loud speaker, especially when listening to orchestra music, are quite distinct when using my improved tone cabinet, the result being due in part to the hollow side wall and to the sound boxes, in part, and the general arrangement of the latter. l

Various changes may be resorted to provided that they fall within the spirit and`scope of the invention.

I claim as my invention:

l. A structure of the class described having a wall through which sound is adapted to be introduced, and side walls in spaced relation extending therefrom, said side walls being hollow and slotted so as to have restricted communication with the space between them.

2. A structure of the class described having a wall through which sound is adapted to be introduced, and side walls in spaced relation extendving therefrom, said sidewalls being hollow, comprising spaced-apart panels, the innermost panels having slots therein so as to have restricted communication with the space between them.

3. A structure of the class described having a wall through which sound is adapted to be introduced, and side walls in spaced relation extending therefrom, said side walls being hollow, and upper and lower sound boxes disposed between said sidewalls.

4. A structure of the class described having a wall through which sound is adapted to be introduced, and side walls in spaced relation extending therefrom, said side walls being hollow, and upper and lower sound boxes, the upper sound box y duced, and side walls in spaced relation extending therefrom, said side walls being hollow, and

A upper and lower sound boxes, the upper sound box extending rearwardly further than the lower sound box, said sound boxes having facing inclined walls provided with sound openings, and arcuate slots in the inner panels of said walls.

'7. A structure of the class described having a wall through which sound is adapted to be introduced, side wall, and upper and lower sound boxes in iront of the first-mentioned wall and between the sidewalls, one of said sound boxes being spaced .from the iirst mentioned wall.

8. A structure of the class described having a wall through which sound is adapted to be introduced, side walls, and upper and lower sound boxes in front of the first-mentioned wall and between the side Walls, one of said sound boxes being spaced from the rst mentioned wall, said sound boxes having facing walls disposed at an upward angle, the latter walls having openings therein.

FRANK C. CARTER. 

